C++

Zip an Email's Attachments into One File

Demonstrates the Chilkat Email.ZipAttachments method, which replaces all of an email's attachments with a single Zip file attachment having the specified filename. The original attachments are removed and packed into the Zip. This example adds two attachments and zips them into one.

Background: Bundling multiple attachments into a single .zip keeps a message tidy, compresses the payload, and works around recipients or gateways that limit the number of attachments. Note that the filename here (files.zip) names the attachment inside the message — it is not a path on disk. The reverse operation is UnzipAttachments.

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C++

#include <CkEmail.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the ZipAttachments method, which replaces all of an email's attachments
    //  with a single Zip file attachment having the specified filename.  The original
    //  attachments are removed and packed into the Zip.

    CkEmail email;
    email.put_Subject("Zip the attachments");

    email.AddStringAttachment("a.txt","first attachment");
    email.AddStringAttachment("b.txt","second attachment");
    std::cout << "NumAttachments before = " << email.get_NumAttachments() << "\r\n";

    //  Replace all attachments with a single Zip attachment named "files.zip".
    success = email.ZipAttachments("files.zip");
    if (success == false) {
        std::cout << email.lastErrorText() << "\r\n";
        return true;
    }

    std::cout << "NumAttachments after = " << email.get_NumAttachments() << "\r\n";
    }